Re: [SI-LIST] : modeling languages (was: receiver jitter)

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From: Fred Balistreri (fred@apsimtech.com)
Date: Fri Jan 21 2000 - 13:35:26 PST


Kim, this is getting pretty old and fustrating. All of the stuff
plus more is avaliable in our spice. You actually evaluated it
but obviously missed some important points. I know the weak
points to our products, GUI and integration are not its strong
points. And I fully understand why you went with Cadence.
But to be frank as SI SPICE packages go we got the best
implimentation and most of the feature you guys have been
clamering about have been there since 1991. We are a small
company and don't have the marketing might that Mentor or
Cadence have but our technology still remains sound and we
have many technical advantages that some guys of this reflector
could use. So its getting hard to read this stuff and take it
seriously. SPICE PLUS was circa 1986. The GUI is still unsurpassed
for analog applications. But we have added lots of neat stuff in
our SPICE some of which shows up as a wish list for Hspice on
the SI reflector. And I fully understand why people use Hspice as
well but come on guys WAKE UP!

Best Regards,

Kim Helliwell wrote:

> That's pretty much what I thought you meant. I know of
> a SPICE-like simulator that does most of that (in fact,
> I worked on it in a former career).
>
> Unfortunately it's not an SI-centric simulator (does
> not have lossy couple transmission lines, for example)
> and it's not directly available on the market. It's
> not impossible to get hold of, but there's little current
> support for it because it's an orphaned part of a larger
> software package.
>
> I don't know why other simulator suppliers haven't tried
> to duplicate this sort of thing. As far as I'm aware,
> HSPICE has nothing close to this, and I don't know about
> PSPICE, but I don't think it does either. Cadence's Spectre
> has HDL (in various flavors) but, while SpectreHDL is
> very powerful, there's a fairly steep learning curve to
> use it effectively. I don't think anyone comes close
> to the AWB/SpicePlus implementation of behavioral sources
> for power plus ease of use.
>
> Pretty good for an essentially defunct product!
>
> "C. Kumar" wrote:
> >
> > I meant the type mix is too elaborate. You need a
> > generic voltage and a current source with the
> > capability to add delay. For describing them very
> > generally you will need to implement powerfull
> > expressions and multidimensional tables and event
> > trigger mechanism. S parameter and Laplace data types
> > will be usefull pluses.
> >
> > The expressions should include logical 'if else' and
> > derivatives.
> >
> > With this mix you may be able to completely obselate
> > mega polynomial data typoes and other special key
> > words like current controlled current source i.e F and
> > H elements.
> >
> > With these sources in my kitty it is possible to build
> > compact, accurate, elegant and powerful behavior
> > models.
> >
>
> --
> Kim Helliwell
> Senior CAE Engineer
> Acuson Corporation
> Phone: 650 694 5030 FAX: 650 943 7260
>
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--
Fred Balistreri
fred@apsimtech.com

http://www.apsimtech.com

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